"Perhaps the simplest ... of the notions concerning determinants of positive attraction is that of propinquity." Essentially the proposition of propinquity says: Other things equal, people are most likely to be attracted toward those in closest contact with them. In general, as frequency of interaction between 2 or more persons increases, the degree of their liking for one another increases. A number of general statements relating to interpersonal attraction are considered including propositions of complementarity and perceived similarity. An original investigation of male transfer students to the University of Michigan all of whom were strangers to each other before sharing a student house is discussed. 18 references.